rails                  
                                          
                                          
  
                                          
  
                                          
                                          
 trains  are  so  constructed  that  they 
 have to follow a  set path. this path is 
 called  a "railway", which  is comprised 
 of two metal rails, hence its  nickname. 
                                          
 because  the  low  friction between  the 
 wheels  of the train and the rail metal, 
 there are limits for  how acute  a curve 
 can  be, and  even more so for how  much 
 the   ground  under  the  rails  can  be 
 sloped. thus a  railway is often not led 
 on top of hills, rather through them  in 
 tunnels  (if   they   are   large),   or 
            artificial chasms.            
                                          
 there  will be  trees on the side of the 
 rails, but not  too close,  or they will 
 be  cut down by  the  railway  janitors. 
 there  will  be plains,  and  bodies  of 
                  water.                  
                                          
 trains go by  day  and by  night.  along 
      the way, there is information       
 scattered, often  put on  top of  poles, 
 to  be interpreted by the train drivers. 
 different  parts  of  the  railway  have 
          different speed limits.         
                                          
 sometimes, trains have to stop and  wait 
 for something to  happen, far away. this 
 is  signaled  by  red  or  green lights. 
                                          
                                  
                                          
 many  people  follow the  rails by foot. 
 often  this  proves  to  be  the shorter 
 path between  two  points.  however this 
 is   frowned  upon,  and  very  impolite 
        toward the train drivers!